Grace Belgravia

"The Grace is a boon to womankind as far as we're concerned: A private, women-only club in one of London's upper-crust neighborhoods, it's as great to hit for a business meeting as it is for a spa break, a green juice, a healthy lunch, or any number of holistic treatments with some of the city's most renowned healers. It's a one-stop shop for everything from colonics to IV infusions, and those who have the spare cash might consider the three- to five-day Intensive Cleanse, which includes a nutritional plan and everything from lymphatic drainage to Acqua Calda hammam treatments. It's a pretty great place to kick-start a health and wellness regimen."